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PHP Ds / Sequence shift () function

Syntax:
mixed abstract public DsSequence::shift (void)
Parameters: this function takes no parameters.Return Values:This function returns the first value removed from the sequence.The following programs illustrate the Ds / Sequence::shift()in PHP:Program 1:  
// Create a new sequence $seq = new DsVector ([9, 10, 15, 20]);  
// Use shift() to remove
// first element from sequence var_dump ( $seq -> shift()); var_dump ( $seq -> shift()); var_dump ( $seq -> shift()); var_dump ( $seq -> shift());  
?>
Output:
int (9) int (10) int (15) int (20)
Program 2:  
// Create a new sequence $seq = new DsVector ([ "Geeks" , " for " , " Geeks " ]);  
// Use shift() to remove
// first element from sequence var_dump ( $seq -> shift()); var_dump ( $seq -> shift()); var_dump ( $seq -> shift());  
?>
Output:
string (5) "Geeks" string (3) "for" string (5) "Geeks"
Link: http://php.net/manual/en/ds-sequence.shift.php

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